Heat - orchestration service

Inspired by Amazon's CloudFormation service, Heat helps operators model and set up OpenStack resources so that they can spend less time managing these resources and more time focusing on the applications that run on OpenStack.

You begin with a blueprint or Heat Orchestration Template (HOT) that describes all the OpenStack resources to be provisioned. Heat then takes care of provisioning and configuring, with no need to worry about dependencies or order of execution—a template describes all the resources and their parameters. After the stack has been created, your resources are up and running.

Templates are extremely convenient because they allow operators to check them into a version control system to easily track changes to the infrastructure. If problems occur after deploying a Heat template, you simply restore to a previous version of the template. If you want to make a change to the stack, you can easily update it by providing a modified template with new parameters.